DTC B18B4, B1E64

DTC B18B4  : Left Side BSI Radar Unit Dirty DTC B1E64  : Right Side BSI Radar Unit Dirty

NOTE: 

• Before you troubleshoot, review the general troubleshooting information .
• DTC B18B4 or DTC B1E64 may be stored due to environment (including weather, a traffic condition, and the drive situation) or temporary contamination around the rear bumper.

DTC (BSI)

1. Problem verification

   -1. Turn the vehicle to the ON mode.

   -2. Clear the DTC with the HDS.

   -3. Turn the vehicle to the OFF (LOCK) mode.

   -4. Turn the vehicle to the ON mode, then wait for at least 5 seconds.

   -5. Check for DTCs with the HDS.

   DTC Description	DTC
   B18B4 Left side BSI radar unit dirty
   B1E64 Right side BSI radar unit dirty

   Are any DTCs indicated?

   YES 

   The failure is duplicated. Go to step 2.

   NO 

   Intermittent failure, the system is OK at this time. Refer to intermittent failures troubleshooting .

2. Outside rear bumper check

   -1. Check the outside of rear bumper for snow, ice, dirt, contaminants, or stickers.

   Is it OK?

   YES 

   Go to step 3.

   NO 

   Completely wipe off any dirt or contaminants from the rear bumper.

3. Inside rear bumper check

   -1. From the rear wheel arch, remove the appropriate side of the rear bumper .

   -2. Check the inside of the rear bumper for snow, ice, dirt, or contaminants. Also, check the appropriate BSI radar unit surface for dirt or contaminants.

   Is it OK?

   YES 

   Replace the appropriate BSI radar unit .

   NO 

   Clean the inside of the rear bumper for dirt or contaminations around the BSI radar unit.